Thanks @DaveSch, I wasn’t aware of this possibility.
However, it’s in the info box that opens, when you click the family box, I would like to have the image shown.
Another thing a bit more serious @ztlxltl . In the settings of Family Boxes, if I add an image line, and then try to change the size of image Gramps crashes - no error message.
This is Gramps v6.0.1, FTV 0.1.145 on MacOS Ventura